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<?php $date = new \DateTime('2018-10-31'); $date->modify('+61 days'); var_dump($date->format('Y-m-d')); $date2 = new \DateTime('2018-10-31'); $date2->modify('+1 month'); var_dump($date2->format('Y-m-d')); $date2->modify('+1 month'); var_dump($date2->format('Y-m-d'));
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
string(10) "2018-12-31" string(10) "2018-12-01" string(10) "2019-01-01"
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(10) "2018-12-31" string(10) "2018-12-01" string(10) "2019-01-01"

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